Magazine closure for stapling machines



Feb. 9, 1943. E. KRANTz MAGAZINE CLOSURE FOR STAPLING MACHINES Filed June l2, 1941 l Il IlI Patented Feb. 9, 1943 UNITED STATES PATENT OFFICE 2,310,529 MAGAZINE cLosUaE Foa srAPmNG MAcmNss Edward Krantz, deceased, late of Chicago, Ill., by

Helen Krantz, administratrix, Chicago, lll., assignor of one-half to Henry A. Torstenson, and one-half to Valentine Pearson, both o I.' Chicago,

Application June 12, 1941, Serial No. 397,789

2 Claims.

In fastener driving devices, and particularly in devices of the type employing U-shaped staples, clogging sometimes occurs in the narrow guideway through which the staples are driven due to one or more of the staples being too large or too small or of incorrect form. To permit the guideway to be cleared when this occurs a section of the front wall of the guideway may be made removable.

'I'he object of the present invention is to provide, in a fastener driving device, improved means for eecting quick and easy removal of a section of the front wall of the guideway and accurate as Well as quick and easy replacement of the same. v

Other more specic objects and advantages of the invention will be evident to those skilled in the art upon a full understanding of the nature of the improvement.

One form of the invention is presented herein by way of illustration but it will of course be appreciated that the invention is susceptible of being embodied in various other vstructurally modified forms coming equally within the scope of the appended claims.

In the accompanying drawing:

Fig. 1 is a side view of a fastener driving device provided with the improvement -of the invention;

Fig. 2 is a bottom plan view of the device;

Fig. 3 is'a fragmentary side view of the device, showing the lower portion of the same with the removable wall section disconnected and moved forwardly; and

Fig. 4 is a vertical longitudinal section through the lower portion of the device, showing the retaining member for the removable front Wall plate in side elevation.

The improvement which constitutes the invention is applicable to all kinds of fastener driving devices, such as stapling machines, compression tackers, magazine hammers, etc. The particular device selected herein to illustrate one application of the invention is a compression tacker, used for driving U-shaped staples into wood, cardboard or other surfaces.

As will be observed in the drawing this compression tacker includes a head I0, a staple carrying bar II, a hand grip I2 and an operating handle I3. In use this tacker is adapted to be positioned flatly against the surface into which the staple is to be driven. When the handle I3 is fully depressed a spring actuated blade I4 will be released and forced downwardly through astaple guideway I5, driving the foremost one of a number of staples I6 from the guideway I5 into the surface against which the tacker is positioned. A device of this general character is v shown in a copending application of Edward Krantz, Serial No. 294,992, filed September 15, 1939.

The guideway I5 is provided with a removable front wall section I1, which permits the guide-4 way to be quickly cleared in the event the tacker becomes jammed by reason of a staple sticking in the guideway. This removable front wall section consists of a plate which is provided with side anges I 8. The side anges I8 snugly embrace the sidewalls I9 of the head I0 and are provided with rearwardly opening notches 20 and 2I for the reception of indexing pins 22 and 23 projecting from the side walls I9. The side iianges I8 are also provided with downwardly opening notches 24 for the reception of the oppo. site ends of a cross rod 25 carried by the front end of a locking bar 26. The locking bar 2B is positioned in a groove 21 in the bottom of the staple carrying bar II and is pivotally mounted at its rear end on a pin 28 carried by the bar I I. The front end of the locking bar 26 is pressed upwardly at all times by a spring 29 which engages' with the rear end of the bar.

To remove the plate I'l it is merely necessary to grasp the projecting ends of the cross rod 25 and force the latter downwardly to a position free from engagement with the notches 24, whereupon the plate I l can be withdrawn forwardly and disengaged from the indexing pins 22 and 23. After the guideway I5 has been cleared, the plate I1 can be put back into interlocked engagement with the indexing pins and the front end of the 1ocking bar 26 allowed to spring up into its normal position with the ends of the cross rod 25 seated in the locking notches 24 of the plate.k This simple yet eiective locking arrangement makes unnecessary the use of any screws or other fastening devices requiring tools for their operation.

I claim:

l. In a fastener driving device comprising a head with a vertical fastener driveway and a staple driving blade in the guideway; a removable front wall section for said guideway provided with flanges which extend rearwardly in engagement with the side walls of the head, indexing studs which project laterally from the side walls of the head into rearwardly opening notches in the flanges for positioning the anges accurately when the same are moved into their rearmost positions, means for positively locking the flanges in their rearmost positions, and spring means for maintaining the locking means in operative Dosition, said spring means being resiliently yieldable to permit the locking means to release the front wail section. n

2. In a fastener driving device comprising a head with a vertical fastener driveway and a staple driving blade in the guideway; a removable iront wall section for said guideway provided with flanges which extend rearwardly in ensue-r.:

positions.

HELEN KRAN'IZ.

ment with the side walisof the head. indexing Als Administratriz of the Estate of Edward studs which project laterally from the side walls 10 Krantz, Deceased. 

